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Intelligent reflection surface assisted wireless communication reflection phase configuration method

A reflective phase and reflective surface technology, which is applied in radio transmission systems, energy consumption reduction, space transmit diversity, etc., can solve problems such as difficult application, lack of signal receiving and sampling functions, difficulty in obtaining instantaneous channel state information, etc., and achieve fast Calculation, the best received signal quality, the effect of fast calculation speed

Active Publication Date: 2020-05-29
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the smart reflective surface can be regarded as a passive device when reflecting signals, it does not have the functions of signal receiving and sampling, and its information is folded in the low-dimensional observation signal at the receiving end. In particular, when the number of reflection units is large, the problem of obtaining instantaneous channel state information will become more difficult, and it is difficult to be applied in practical systems

Method used

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  • Intelligent reflection surface assisted wireless communication reflection phase configuration method
  • Intelligent reflection surface assisted wireless communication reflection phase configuration method
  • Intelligent reflection surface assisted wireless communication reflection phase configuration method

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Embodiment 1

[0058] This embodiment shows how to realize the reflection phase configuration method for intelligent reflective surface assisted wireless communication according to the present invention. In this embodiment, the number of units of the smart reflective surface is N=256, which is regularly distributed in space, and the corresponding statistical channel state information covariance matrix Σ in has a certain regularity, here it is set as a commonly used correlation model ∑ in [n,m] is the statistical channel state information covariance matrix ∑ in The [n, m]th element of , wherein ρ is a real number less than 1, representing the correlation coefficient between adjacent units, ρ is taken as 0.5 in this embodiment, ρ |m-n| Representation ∑ in The amplitude value of [m,n] is only related to the absolute value of the difference between the unit number m and n. When the absolute value of the difference becomes larger, ∑ in [m,n], that is, the correlation between the m and nth ...

Embodiment 2

[0070] This embodiment provides another method for implementing the intelligent reflective surface-assisted wireless communication reflective phase configuration method described in the present invention. In this embodiment, the number of units of the smart reflective surface is N=256, which is regularly distributed in space, and the corresponding statistical channel state information covariance matrix Σ in has a certain regularity, here it is set as a commonly used correlation model ∑ in [n,m] is the statistical channel state information covariance matrix ∑ in The [n, m]th element of , wherein ρ is a real number less than 1, representing the correlation coefficient between adjacent units, ρ is taken as 0.9 in this embodiment, ρ |m-n| Representation ∑ in The amplitude value of [m,n] is only related to the absolute value of the difference between the unit number m and n. When the absolute value of the difference becomes larger, ∑ in [m,n], that is, the correlation between ...

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Abstract

The invention discloses an intelligent reflection surface assisted wireless communication reflection phase configuration method, which comprises the following steps: a sending end sending a pilot signal to a receiving end, so that the receiving end obtains statistical channel state information; the receiving end calculating the optimal reflection phase according to the obtained statistical channelstate information; controlling the intelligent reflection surface through a wired or wireless link, so that the reflection phase of the nth reflection unit is equal to the optimal reflection phase, and when the carrier frequency, the relative spatial position or the wireless transmission environment between the sending end and the receiving end is changed to cause the change of the statistical channel state information, repeating the steps. According to the method, the reflection phase is configured by using the statistical channel state information, so that the optimal reflection phase can be quickly calculated, the power of the received signal can be maximized under the statistical significance, the reflection coefficient configuration can be quickly updated, and the system can quicklymatch the statistical characteristic change of the channel.

Description

technical field [0001] The invention relates to an intelligent reflective surface-assisted wireless communication reflection phase configuration method, which belongs to the technical field of wireless communication. Background technique [0002] Traditional wireless communication systems focus on the design and optimization of transmitters and receivers. For the propagation environment between transceivers, since neither the transmitter nor the receiver can be controlled, it is considered an external factor, which can only be passively adapted and cannot be actively modified. Recently, the advancement of new artificial electromagnetic material technology represented by intelligent reflective surfaces has provided a feasible way for wireless communication systems to actively transform the propagation environment, making it a controllable part of the overall design of wireless communication systems, and realizing a programmable wireless environment. technical means. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/0632H04B7/0626H04B7/0663Y02D30/70
Inventor 寇周斌祁栋华鲁文韬高佳峻党建张在琛吴亮
Owner SOUTHEAST UNIV
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